Charles River Bridge (Commuter Rail)

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Charles River Bridge
Charles River Bridge from side with train 2013.JPG
Charles River Bridge with a train in 2013
Coordinates 42°22′08″N71°03′55″W / 42.36898°N 71.06529°W / 42.36898; -71.06529
Carriesrail traffic over 4 tracks, split between the two bridges
Crosses Charles River
Locale Boston, Massachusetts
Characteristics
Designsingle-leaf, through-truss, rolling bascule bridge
Material Steel
Total length92 feet (28 m) (±5 feet (1.5 m))
No. of spans1
Piers in water0
History
DesignerKeller & Harrington, Chicago [1]
Opened1931 [1]
Location
Charles River Bridge (Commuter Rail)

The Charles River Bridge, referred to by the MBTA as Draw One, is a pair of railroad single-leaf, through-truss, rolling bascule bridges across the Charles River in Boston, Massachusetts that connects North Station to MBTA Commuter Rail lines serving areas to the north.

Contents

History

MBTA 1131 departing with a Haverhill service P1010110 MBTA 1131 Charles River Bridge.jpg
MBTA 1131 departing with a Haverhill service

Although rail bridges across the Charles River near the present location of North Station have existed since the Boston and Lowell Railroad opened in 1835, the current bridges date from 1931, when the navigable channel of the Charles River was shifted 300 feet to the north of its former route to allow the platforms at North Station to be extended northwards. [1] [2] These bridges were designed by Keller & Harrington of Chicago, Illinois, and built by the Phoenix Bridge Company of Phoenixville, Pennsylvania. Each bridge uses a 629-short-ton (571 t) over-head concrete counterweight. Originally, there were four bridges, but only two of them remain. [1] The bridges were formerly connected to North Station by a wooden trestle; the trestle burned in January 1984, forcing all trains to terminate at a temporary station north of the river for 15 months. [2]

The two aging two-track draw spans are planned to be replaced by three new two-track spans, which will be more reliable and have higher capacity. The unfinished sixth platform at North Station will be completed to serve long out-of-service tracks 11 and 12, the Fitchburg mainline will be slightly relocated to provide more layover space near the maintenance facility, and FX interlocking will be reconfigured. [3] [4] The signals contract associated with the new drawbridges was awarded in May 2019. [5] As of November 2022, signal work is expected to be completed in August 2023. [6] Design of the new vertical lift bridges began in 2019 and was 75% complete by May 2023, with design completion expected in 2024. [3]

In September 2024, the MBTA was awarded a $472 million federal grant for the bridge replacement. [7]

See also

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References

  1. 1 2 3 4 "Boston & Maine Railroad, Charles River Bridges, Charles River, North Station vicinity, Boston, Suffolk County, MA". Washington, DC: Historic American Engineering Record. 1984. pp. 2–3. Retrieved 2009-07-16.
  2. 1 2 Humphrey, Thomas J. & Clark, Norton D. (1985). Boston's Commuter Rail: The First 150 Years. Boston Street Railway Association. pp. 55, 57, 65–66. ISBN   9780685412947.
  3. 1 2 "North Station Draw One Bridge Replacement: Project Overview Spring 2023" (PDF). Massachusetts Bay Transportation Authority. May 2023.
  4. ↑ "Commuter Rail Schedules Initiative: North Side" (PDF). Massachusetts Bay Transportation Authority. October 6, 2015. p. 13. Archived from the original (PDF) on February 2, 2017. Retrieved October 14, 2016.
  5. ↑ "MBTA Contract No. Q60CN01: North Station Terminal Area Signal System Improvements" (PDF). Retrieved 29 December 2019.
  6. ↑ "North Station Terminal Area Signal System Improvement Project". Massachusetts Bay Transportation Authority. Retrieved November 29, 2022.
  7. ↑ "Massachusetts Wins $472 Million in Federal Funding for North Station Draw One Bridge Replacement" (Press release). Massachusetts Bay Transportation Authority. September 23, 2024.
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